Grain-binder



(No Model.) 2 Sheets8heet 1.

W. MARSHALL.

GRAIN BINDER.

llllllllllflllllllllllll WITNESSES: INVENTOR Av m WOQMM ATTORNEY (No Model.) 2 Sheets-Sheet 2. W. MARSHALL.

GRAIN BINDER.

Patented May 11, 1886.

WITNESSES n N R 0 n A UNITED STATES PATENT OFFICE.

XVILLIS MARSHALL, OF CHICAGO, ILLINOIS.

GRAIN-BINDER.

ELE EQIFIQATIQN forming par. of Letters Patent No. 341,589, dated May 11, 1886.

Application filed April 11, 1885.

To (tZZ whom it may concern:

Be it known that I, WILLIs MAEsnALL, of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Grain-Binders, of which the following is a specification.

In the present type of Appleby binders,now so well known to those skilled in the art to which the present invention belongs, the binding mechanism is thrown into action (whenever apredetermined resistance is opposed to the packers as they force the grain into the bindingrcceptacle) by means of a trippinglever engaging the hub or the body portion of a tripping-dog, which in turn acts to release a clutch otherwise held out of contact with a constantly moving part of the binder. As this type of binder is now generally manufactured the tripping-dog is loosely mounted upon the binder-arm shaft on the end nearest the train of the gearing which operates the binding mechanism, and is held yieldingly depressed and in position to perform its office while the binder is at rest by means of a spi ral spring exerting its expansive force in a direction coincident with the axis of the coil, the spring being held in place by a bolt or rod passing through the body of the tripping-dog, and screw-threaded on one end for the reception of an adjusting-nut and pivotally connected at its other end with the crank of the binder-arm shaft. This construction of the tripping-dog and spring and their mode of connection, while ordinarily answering the purpose intended, has been found objectionable in several particulars. The dog is materially weakened by the hole bored through it for the reception of its spring-retaining bolt, necessitating increased thickness and strength of material and consequently increased cost of manufacture. The constant friction of the spring-retaining bolt upon the sides of the hole gradually increases its diameter, so that the spring will slip through and become inoperative, and the mode of adjusting the tension of the spring is slow and awkward and involves the use of a wrench.

My invention is designed to remedy these objections, and, while retaining all the advantages of the old construction, to improve upon it in the way of producing a stronger tripping- Serial No. 161,950. (No model.)

dog, and one that is not liable to wear and render its depressing-spring inoperative; in dispensing with certain parts needed in the old construction, and in affording a spring whose adjustment is quickly effected without the use of tools.

To these ends my invention consists in an improved form of tripping-dog, and in a novel arrangement therewith of its depressing-spring.

In the drawings, Figure 1 is a side view of so much of a binder as is needed to show my invention; Fig. 2, a view of the parts shown in Fig. 1, looking in the direction of the arrow, and Figs. 3 and 4.- side aud top views, respectively, of my improved tripping-dog and spring detached from the binder.

A is the trippingdog, which may be cast or otherwise made in the form shown in Figs. 3 and 4, with a hub, a, to fit loosely over the binder-arm shaft and s'ufficient-ly elongated to serve as a bearing for the coiled spring B, and with a flange or arm, it, having notches or teeth for the engagement of one end, I), of the spring. In other respects the dog is similar to the old form.

The spring B may be simply bent once or may be of any desired number of coils, and is fitted over the elongated hub of the trippingdog, its end I) being connected in any suitable manner to the crank-arm d of the binder-arm shaft D, or it may be to the shaft itself, and its end 1) extended over and engaged with the notches or teeth on the flange a of the tripping-dog. This end b is bent downward near its extremity, so as to form a hook for easier manipulation when it is desired to increase or diminish the tension of the spring by changing from one notch to another; but of course this may be dispensed with, as the straight end would answer the purpose.

To apply the spring, it is only necessary to disconnect the pitman E from the crank 01 and slip it over the crank to its place on the trippingdog hub. It will thus be seen that in caseof breakage a new spring can be readily substituted in short time.

The binder-arm G and the clutch F G are connected with their respective parts and operated therewith, as usual, and the latter engages with the tripping-dog according to the original way in the Appleby binder.

ICO

From this description it will be seen that I dispense with the spring-retaining bolt, the objectionable features of which I have already pointed out; that I am able to effect a quick adjustment of the depressingspring without,

the use of tools; that in case of breakage of the spring it can be easily replaced, and that my improved tripping-dog is not liable to break, as in the old form.

- IVhile I have shown the tri iping dog similar to the old, except wherein I have discriminated, it is obvious that my improvements could be made with one of different contour. For instance, the flat portion a absolutely necessary in the old form for the reception of the spring-retaining bolt, can be entirely dis pensed with; and while I have shown the hub of the dog as elongated for the reception therein of the depressing-spring, it is obvious that this hub may be shortened and the spring slipped into place directly onto the binderarm shaft intermediate the crank-arm thereof and the tripping-dog; but while these and other modifications will occur to those familiar with the art without'departing from the Spirit ing mechanism, of the tripping-dog, its de- 40 pressing spring having one of its ends fast to the binder-arm shaftor its crank, andits other end engaging the notched flange 011 the dog.

\V ILLTS MARSHALL.

\Vitnesses:

E. E. DARLING, W'ILLLAM HAWARD. 

